One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,4)(3,7,8,6)(10,13)(11,15)(17,18)(19,26)(20,24)(21,30)(22,25)(23,27)(28,31)(29,32)(1,3)(2,6)(4,7)(5,8)(10,13)(11,15) involution — undirected(1,4,5,2)(3,7,8,6)(9,10)(11,14)(12,13)(15,16)(17,19,21,27,22,28,20,29)(18,23,24,26,25,32,30,31)(3,8)(6,7)(10,13)(14,16) involution — undirected(9,11,12,15)(10,14,13,16)(17,20,22,21)(18,24,25,30)(19,27,28,29)(23,31,32,26)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.